LBBB: The ECG Patterns and Cardiac Function in Patients With and Without Coronary Artery Disease

Left bundle branch block (LBBB) is a common conduction abnormality. Its prevalence increases from 0.4% at age 50 to 6.5% at age 80. (Eriksson, Hansson et al. 1998) LBBB is seen in many diseases such as coronary artery disease (CAD), hypertension, valvular heart disease, non-ischemic cardiomyopathies and conduction tissue defects/degenerations. (Nisse 1929; Jain and Mehta 2003) Identifying CAD in patients with LBBB has been the subject of many studies and remains a clinical challenge.